LSHSS
Research Article
Segmentation and Representation of
Consonant Blends in Kindergarten
Children’s Spellings
Krystal L. Werfel a and C. Melanie Schuele a
Purpose: The purpose of this study was to describe the
growth of children’s segmentation and representation of
consonant blends in the kindergarten year and to evaluate
the extent to which linguistic features influence segmentation and representation of consonant blends. Specifically, the roles of word position (initial blends, final
blends), class of blends, homorganicity, and nasality were
considered.
Method: Forty kindergarten children completed a developmental spelling measure (26 words with initial or final blends)
3 times at 6-week intervals. Responses were analyzed for
logical representation of speech sounds to describe developmental change and differential accuracy of segmentation and
representation across blend types.
Results: Kindergarten children showed varied ability to segment
and represent consonant blends and were differentially successful
depending on the linguistic features of the blends. Children were
more likely to represent initial blends than final blends, final nonnasal blends than final nasal blends, nonhomorganic blends than
homorganic blends, and initial nasal blends than final nasal blends.
Conclusion: During the period of emergence, the properties of
phonemes that comprise consonant blends influence children’s
ability to segment and represent blends. This finding has implications for how phonemic awareness and spelling instruction and
intervention might proceed.
here is broad agreement that phonemic awareness
and orthographic knowledge underlie the development of word decoding skills and spelling (e.g.,
Adams, 1990; Stahl & Murray, 1994; Wagner & Torgesen,
1987). This study explored the development of one aspect
of kindergarten children’s phonemic awareness and orthographic knowledge: the segmentation and representation of
consonant blends.
1987). To demonstrate phonemic awareness, a child must
attend to the sound structure of words separate from a focus
on word meaning (Snow, Burns, & Griffin, 1998). One
phonemic awareness skill crucial to early literacy is phonemic segmentation. Phonemic segmentation involves breaking words into their component sounds (e.g., cake into /k/ /e/
/k/). Phonemic segmentation emerges as early as the late
preschool years (Lonigan, 1998) and continues to develop
into early elementary school. The incremental development
of phonemic awareness (e.g., Uhry & Ehri, 1999) suggests
that children are first able to segment words at the onsetrime level (e.g., c-at, st-op). From onset-rime segmentation,
children proceed to segmentation of simple words in which
singleton consonants (C) abut vowels (V; VC, CV, CVC).
Finally, children develop the ability to segment words with
consonant blends (CCVC, CVCC). For many children, skill
at a lower level (e.g., CVC segmentation) does not easily
generalize to other levels (e.g., CCVC segmentation; Bruck &
Treiman, 1990). Rather, explicit instruction and practice at
each level is needed, particularly for struggling learners
(O’Connor, Jenkins, Leicester, & Slocum, 1993).
Word and sound features may influence children’s success at segmenting and representing consonant blends. For
example, with respect to analyzing initial singleton consonants,
T
Phonemic Awareness
Phonemic awareness is a metalinguistic skill that is characterized by the ability to analyze the individual phonemes
of spoken language (Mattingly, 1972; Wagner & Torgesen,
a
Vanderbilt University School of Medicine, Nashville, TN
Correspondence to Krystal L. Werfel:
[email protected]
Editor: Marilyn Nippold
Associate Editor: Kenn Apel
Received January 24, 2011
Revision received June 20, 2011
Accepted January 10, 2012
DOI: 10.1044/0161-1461(2012/11-0005)
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Key Words: phonemic awareness, orthographic knowledge,
developmental spelling, segmentation, literacy development
SCHOOLS • Vol. 43 • 292–307 • July 2012 * American Speech-Language-Hearing Association
a continuant phoneme (e.g., /s/) generally is easier to segment
than a stop phoneme (e.g., /p/; Marsh & Mineo, 1977), and
an initial sound is more easily segmented in a short word as
compared to a long word (Treiman & Weatherston, 1992).
Similarly, an initial sound is more easily segmented in a
CVC word as compared to a CCVC word (Treiman, 1991).
Understanding the influence of word and sound features on
children’s segmentation success may be particularly important when designing early literacy interventions for children
who are struggling learners.
Orthographic Knowledge
Another type of knowledge important in early literacy
development is orthographic knowledge. Orthographic
knowledge is the information that one stores in memory
for how spoken language is represented in writing (for a
tutorial, see Apel, 2011). Two types of knowledge comprise
orthographic knowledge: (a) knowledge of orthographic
patterns and (b) knowledge of mental grapheme representations (MGRs).
Knowledge of orthographic patterns. Knowledge of
orthographic patterns is knowledge of the rules that govern
how phonemes can be represented with graphemes within
a particular language. Orthographic pattern knowledge
begins to emerge as early as kindergarten (e.g., Cassar &
Treiman, 1997) and includes knowledge of the alphabetic
principle and of patterns and rules (e.g., ways to represent
long vs. short vowels). The alphabetic principle refers to the
insight that phonemes can be represented by graphemes.
Children first realize that certain graphemes represent certain
speech sounds. With more print experience, children gain
greater understanding of grapheme–phoneme correspondences. For example, children begin to understand that single
phonemes can be represented by multiple graphemes (e.g.,
“sh” for /S/) and multiple phonemes can be represented by
a single grapheme (e.g., “x” for / ks/ ).
Knowledge of MGRs. MGRs are mental representations
of the strings of letters of specific words (Apel & Masterson,
2001). Also referred to in the literature as orthographic
images (e.g., Ehri & Wilce, 1982), fully formed MGRs allow
one to read and write words fluently. Children as early as
preschool can form initial MGRs after as few as four exposures to a printed word (Apel, Wolter, & Masterson, 2006).
When a child has a clear MGR for a word, he or she is able
to fluently access meaning and does not need to use other
types of linguistic knowledge (e.g., phonological or morphological) to read or write the word (Wolter & Apel, 2010).
Segmentation and Representation
of Consonant Blends
What is known about the development of consonant
blend segmentation as evidenced by representation has been
gleaned from studies of children’s early spellings. Much of
this work has been undertaken by Treiman and colleagues
(e.g., Treiman, 1991, 1993; Treiman, Zukowski, & RichmondWelty, 1995), who have been interested simultaneously in
phonemic awareness and early spelling acquisition. Most
researchers who have investigated phonemic segmentation
of consonant blends, Treiman included, have used developmental spelling measures. When children have mastered
phoneme–grapheme correspondences, developmental spelling measures can capture sound structure knowledge and are
considered valid measures of phonemic segmentation ability
(Stahl & Murray, 1994).
Using developmental spelling measures, researchers have
concluded that the segmentation and representation of words
with consonant blends is a more difficult, later developing
skill than the segmentation and representation of singletons.
Additionally, the segmentation and representation of blends
represents a separate achievement from the segmentation
and representation of words without blends (e.g., fast vs. fat;
Bruck & Treiman, 1990). When children who have little
or no ability to segment and represent blends are asked to
spell monosyllabic words with blends, they most commonly
represent only one sound in the blend (Treiman, 1993). In
words with initial blends, children nearly always represent
the first sound of the blend (95% of word errors in natural writing conformed to this pattern, e.g., “sop” for stop;
Treiman, 1991, 1993). In contrast, for final blends, children
typically represent the last sound of the blend (e.g., “fat”
for fast; 71% of errors in natural writing spellings and 95%
in an experimental task conformed to this pattern; Treiman,
1993; Treiman et al., 1995).
Based on the invented spellings of 32 preschool children,
Read (1975, 1986) proposed that children are differentially
successful with blend segmentation and representation based
on the linguistic properties of the blends, particularly the
acoustic and phonetic properties of the phonemes that comprise the blend. For example, within final nasal blends, children in Read’s (1975) study were more likely to represent
nasal segments that were longer in duration. Because /n/ is the
nasal segment with the longest duration, it is less likely to
be omitted than other nasal phonemes in blends (e.g., jump, ink).
From Read’s perspective, children should show emerging
ability to segment and represent consonant blends, with
mastery evident after a period of protracted learning and
incremental proficiency influenced by the linguistic properties of speech sounds.
There is limited research that outlines the incremental
development of the segmentation and representation of
consonant blends. The extant literature does not provide a
clear picture of how linguistic features influence children’s
success in segmenting and representing consonant blends.
The primary limitation of the extant literature relates to the
age of children studied: Most studies of blend segmentation and representation have included first-grade children
who were already proficient at segmenting and representing blends (e.g., Treiman, 1993). Thus, the developmental
Werfel & Schuele: Segmentation and Representation of Consonant Blends
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progression of blend segmentation and representation does
not appear to have been captured, providing motivation
for the current study, which included a random sample of
kindergarten children. Our interest in the present study was
to understand how blend segmentation and representation
unfolds. That is, when children show emerging ability to
segment and represent both sounds in consonant blends,
what characterizes the course of development? In the following sections, we summarize the extant literature on the
segmentation and representation of blends.
Initial blends . Treiman (1991, 1993) examined the natural writings of primarily first-grade children that included
390 attempts at words with initial consonant blends. When
comparing blends, Treiman concluded that properties of the
constituent phonemes of blends do not influence children’s
success at segmenting and representing initial blends. She
found no difference between accuracy on voiceless stop +
liquid blends (e.g., pl ) and on voiced stop + liquid blends
(e.g., bl ), nor between s-blends (e.g., sp) and non-s-blends
(e.g., pl ). In addition, children in the Treiman (1991, 1993)
studies did not omit sonorant1 consonants of blends more
than obstruent2 consonants of blends. In contrast, our preliminary examination of kindergarten children’s spelling of
words with initial blends suggested that phonetic features
of the blend do influence children’s ability to segment and
represent each phoneme (Spencer, Schuele, & Werfel, 2007).
Participants included 439 kindergarten children (222 boys;
M = 5;6 [years;months]; SD = 4.5 months). At the end of
kindergarten, children completed a developmental spelling
measure that included four words with initial blends (i.e.,
skate, plum, float, treat). Kindergarten children who did
not yet demonstrate mastery of blend segmentation (blends
represented ≤3) were differentially successful at segmentation and representation across class of blends; children were
most accurate on plum (44%), skate (35%), and float (32%),
and least accurate on treat (18%). When children did not
represent both phonemes of the blend, they were much more
likely across all blends to represent only the initial phoneme
of the blend, consistent with Treiman (1991).
Final blends . Unlike with initial blends, Treiman (1993)
and Treiman et al. (1995) reported substantial differences
in first graders’ spellings across syllable-final blends. The
children in the studies included both sounds of all other types
of final blends more often than they included sounds of
nasal blends. In addition, the children were more likely to
represent the first consonant of final blends if it was an
obstruent rather than a sonorant (e.g., more likely to represent the “f ” in left than the “l” in held; Treiman, 1993;
Treiman et al., 1995). Children represented both phonemes
in final nasal + voiced obstruent blends (e.g., nd) more often
1
A sonorant is a speech sound that is produced without restricted airflow in
the vocal tract. Sonorants include vowels, nasal consonants, and liquids.
2
An obstruent is a consonant that is produced by constricting airflow through
the vocal tract. Obstruents include stops, fricatives, and affricates.
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than in final nasal + voiceless obstruent blends (e.g., nt, mp;
d = .49). To account for children’s relative difficulty with final
nasal blends, Treiman proposed that children attribute the
nasal feature to the preceding vowel and thus do not recognize the need to capture the nasal consonant with a distinct
symbol. However, an alternate explanation may be that final
nasal blends are homorganic.
Homorganicity. Consonants that have the same place of
articulation are said to be homorganic (Ladefoged, 1993).
If children use articulatory cues to segment phonemes (e.g.,
Carroll, Snowling, Stevenson, & Hulme, 2003), homorganic
blends (e.g., st) should be more difficult to segment than
nonhomorganic blends (e.g., sk). When production of a blend
requires a shift in the articulators between the two component
phonemes, that shift may provide a salient physical cue to
the presence of two phonemes; thus, the blend phonemes
would be easier to segment. The empirical evidence on the
influence of homorganicity is mixed. Treiman (1993) and
Treiman et al. (1995) reported that homorganicity did not
influence first-grade children’s segmentation and representation of blends; children did not omit consonants in homorganic
blends (e.g., st) more often than they omitted consonants in
nonhomorganic blends (e.g., sk), regardless of the blend’s
word position. Conversely, van Bon and Uit de Haag (1997)
reported that homorganicity influenced Dutch-speaking first
graders’ performance in spelling final blends but not in the
predicted direction. In their study, both sounds in homorganic
blends were represented more frequently (82%) than in
nonhomorganic blends (71%).
Treiman (1991, 1993) concluded that syllable structure,
and not the properties of the phonemes that comprise the
blend, influences children’s ability to represent initial blends
and final blends with the exception of final nasal blends,
which are particularly difficult for children. However, as
noted previously, Treiman studied children who were relatively proficient at representing both sounds of consonant
blends. Studying blend segmentation and representation in
children with lower levels of proficiency may provide more
detailed insight into any incremental development of blend
segmentation and representation.
Limitations of Extant Research
Nearly all of the extant studies on blend segmentation
and representation have included children in first grade (often
the second half of first grade), and all studies were crosssectional designs. Only in Treiman (1991, 1993) were kindergarten children included. However, only kindergartners who
were judged to be making progress in learning early literacy skills were selected for participation, and they were reading on a first-grade level, suggesting a restricted range of
ability skewed toward highly skilled readers. No growth in
blend representation was realized between the first and second
halves of first grade, and 70% of blends were represented by
two legal consonants (i.e., consonants that both were logical
SCHOOLS • Vol. 43 • 292–307 • July 2012
representations of the phoneme and followed conventional
orthographic rules for occurring in that position of a word).
By first grade, most children appear to have acquired a level of
proficiency that obscures developmental differences between
blends. Thus, if there is reason to believe that children will be
differentially proficient across blends, researchers need to
consider the point in development at which children are
studied. Measuring first-grade performance may not capture
the development of consonant blend segmentation and representation, but rather performance that approaches or is at
mastery. To provide a more complete developmental picture,
it is essential to study blend segmentation and representation
over time in a group of children who have not yet reached
mastery (e.g., kindergarten children).
In summary, the relation between phonemic awareness,
orthographic knowledge, and early literacy is well established. There is general agreement that children must have a
foundation of phonemic awareness and orthographic knowledge on which to build early word decoding and spelling
skills. It is important to understand the development of blend
segmentation and representation because segmentation and
representation of singleton consonants and vowels (e.g.,
CVC, CV, VC segmentation) does not necessarily lead to
segmentation and representation of consonant blends
(Bruck & Treiman, 1990). That is, the segmentation and
representation of consonant blends represents a distinct
achievement in the acquisition of phonemic segmentation
and representation. A thorough understanding of the development of blend segmentation and representation is likely
necessary to address the instructional needs of the lowest
performers in early reading and spelling. Intervention, particularly for struggling learners, should be informed by
knowledge of the incremental development of phonemic
segmentation and representation, including the development of segmentation and representation of consonant
blends.
The purpose of this study was to describe the growth
of children’s segmentation and representation of consonant
blends in the kindergarten year and to evaluate the extent
to which linguistic features influence segmentation and
representation of consonant blends. Specifically, the roles
of word position (initial blends, final blends), class of blends,
homorganicity, and nasality were considered. Kindergarten
children were expected to have some skill in consonant
blend segmentation and representation but not to demonstrate mastery. Thus, the spellings of a group of kindergarten
children were likely to show the developmental change that
would prove informative. Seven research questions were
examined (see Results for hypotheses) with respect to the
segmentation and representation of consonant blends:
& Do kindergarten children exhibit growth in blend
segmentation and representation ability over time?
& Is blend segmentation and representation predicted by
early literacy skills?
& Are children more proficient with initial blend segmentation and representation than final blend segmentation
and representation?
& Does the class of blends influence children’s proficiency at segmenting and representing initial blends?
& Does the class of blends influence children’s proficiency at segmenting and representing final blends?
& Are children more proficient at segmenting and representing homorganic blends than nonhomorganic
blends?
& Are children more proficient at segmenting and representing initial blends that include nasal consonants
than final blends that include nasal consonants?
METHOD
The study protocol and procedures were approved by the
Vanderbilt University Institutional Review Board.
Participants
Study participants were 40 kindergarten children (21 boys;
Mage = 71.1 months, SD = 4.3 months) who spoke English
as their native language and had never received speechlanguage treatment. Demographic information was provided by parent report; 95.6% of parents chose to provide this
information (66.8% answered all questions; 33.8% answered
some questions). Regarding rare/ethnicity, the majority (85%)
of participants selected Caucasian, 10% selected African
American, 2.5% selected Asian, and 2.5% selected other.
Children were recruited from two nonpublic schools
(seven classrooms) in Nashville, TN. Children repeating
kindergarten were eligible to participate (n = 1). Sixty-seven
consent forms were returned. Ten children were excluded
from data collection: Two children did not speak English as
their native language, and eight children had a history of
speech-language treatment. In addition, 17 children who
logically represented 20 or more blends at Time 1 (max 26)
were excluded from analysis because we wanted to capture
development (and not proficiency) of blend segmentation
and representation.
Measures
Developmental spelling. A developmental spelling measure was created to explore children’s segmentation and
representation of 26 two-phoneme consonant blends—18 initial
blends in CCVC real words and 8 final blends in CVCC
real words (see Appendix A). More initial blends were included because of the criteria imposed to select blends for the
study (see below). The developmental spelling measure
consisted of three word lists; each list included one word for
Werfel & Schuele: Segmentation and Representation of Consonant Blends
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each of the 26 blends. First, to create the developmental
spelling measure, a list of all possible two-phoneme blends in
English was compiled (Jakielski, 1998; Treiman, 1991;
Treiman et al., 1995) and 26 blends were chosen. Blends
judged to be extremely uncommon (e.g., /gw/), morphological blends (e.g., /pt/), and final blends with /l/- or /r /-colored
vowels (e.g., /ld /, /rt/) were excluded. Second, three
monosyllabic words (nouns, verbs, or adjectives) were
chosen for each blend. These words were judged by the
authors to be in kindergarten children’s oral vocabulary but
not likely to be sight words. All words except two appear in
first-grade texts (Zeno, Ivens, Millard, & Duvvuri, 1995).3
Third, the words for each blend were randomly assigned to
one of three lists. Fourth, for each list, 10 randomized orders
were created. The developmental spelling word lists are
provided in Appendix A.
Early literacy. Participants’ early literacy skills were
captured with three early literacy measures. Knowledge
of sound–symbol correspondences was assessed with the
Letter Sounds subtest from the Phonological Awareness and
Literacy Screening—Kindergarten (PALS–K; Invernizzi,
Meier, Swank, & Juel, 2001; test–retest reliability is .88).
Children’s reading ability was evaluated using Word Identification Fluency (WIF; Fuchs & Fuchs, n.d.), a curriculumbased measure of reading real words with 100-word lists.
Alternate-form reliability of the WIF is .88 (Fuchs, Fuchs,
& Compton, 2004). Children’s awareness of 11 of the 12 individual phonemes that comprised the 26 blends measured in
the developmental spelling task was assessed with Initial
Sounds, a measure that was developed for this study.4
Procedure
Children participated in three assessments (Time 1, Time 2,
Time 3) at 6-week intervals from November to May (see
Table 1). All assessments were administered at school. At
each time point, children participated in one individual session
(early literacy measures) and one group session (developmental spelling measure). Examiners included two certified
speech-language pathologists (SLPs) and two speech-language
pathology graduate students. The examiners met before data
collection to review the assessment protocols and study
procedures and to clarify any points of confusion.
Both words not occurring in first-grade texts contained final –sp blends.
According to Zeno, Ivens, Millard, and Duvvuri (1995), “gasp” occurred
in second-grade texts but not first grade, and “lisp” occurred rarely in texts.
A search for monosyllabic words ending in –sp and beginning with a
singleton consonant yielded no words that occurred more frequently in
children’s texts.
4
Our intent was to create a measure that would verify that these children
were able to represent as singletons the 12 phonemes that comprised the
26 blends. A review of the measure at the conclusion of data collection
revealed that we had inadvertently omitted G – /g/. Nevertheless, we believe
that Initial Sounds provided a valid measure of the children’s ability to
segment and represent the phonemes used to assess blend representation.
3
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Table 1. Sequence of the constructs that were measured at each
of the three time points.
Time 1 (0 weeks)
November–January
Letter Sounds
Initial Sounds
Word Reading
Developmental
Spelling
Time 2 (6 weeks)
February–March
Time 3 (12 weeks)
March–May
Letter Sounds
Initial Sounds
Letter Sounds
Initial Sounds
Word Reading
Developmental
Spelling
Developmental
Spelling
Note. Letter Sounds = subtest from the Phonological Awareness and
Literacy Screening—Kindergarten ( PALS–K; Invernizzi, Meier,
Swank, & Juel, 2001), Initial Sounds = researcher-constructed
measure, Word Reading = Word Identification Fluency (WIF; Fuchs
& Fuchs, n.d.), Developmental Spelling = researcher-constructed
measure.
Letter sounds. The examiner followed the standardized
administration procedures for the Letter Sounds subtest from
the PALS–K. The examiner asked the child to produce the
sound associated with the letter(s) on a page of 26 uppercase letters and letter combinations (CH, SH, and TH ). One
demonstration item illustrated the task for the child. Errors
were not corrected. One point was given for each correct
response, for a maximum score of 26.
Word reading. The examiner presented the practice list
(total of 5 columns, 20 words per column) and said, “I’m
going to show you some words. Here are some practice
words. You’ll start here (pointing to the top of the column)
and read as many as you can. These are words that big kids
read; so it’s okay if you don’t know all of them. Do the best
you can. If you don’t know a word, you can skip it.” The
examiner demonstrated by reading two words, skipping
the third word, and reading the fourth word. Subsequently,
the examiner presented the test list (same format as the practice list) and continued giving instructions, “Here’s your list.
Start here (pointing to the top of the first column) and read
as many as you can. I’ll tell you when to stop. Go.” Participants were awarded one point for each word they read
correctly in 1 min, for a maximum score of 100. A different
test list was used for each time point.
Initial sounds . The examiner laid out 11 cards, each
with a single capital letter. The child was shown a page
with “__EP” on it. The examiner gave instructions and an
example to the child, “Let’s try to spell some silly words.
You just need to figure out the beginning of the word. I’ll say
the word and then you pick a card. Let’s try this one. ZEP.
We can say it slowly: ZZZEEEP. The beginning of ZEP is
/z /. So I would pick this card. Now it’s your turn.” Test item
instructions were as follows: “Remember, I’m going to say
a silly word and you show me the beginning of the word I say.
You can point to it or put the card in the blank. [WORD (e.g.,
NEP)].” Errors were not corrected. One point was awarded
for each correct representation, for a maximum score of 11.
SCHOOLS • Vol. 43 • 292–307 • July 2012
Developmental spelling. For ease of administration, at
Time 1, children were assigned to groups of two or three
based on similar word reading performance. In these groups,
children completed the developmental spelling measure after
completing the early literacy measures. The children were
positioned at a table or on the floor with dividers to ensure
that each child was unable to see his or her peers’ spellings.
Children were instructed to write their responses on a form
that included the alphabet in capital and lowercase letters
at the top of the page and 26 numbered lines for responses
(13 on each side). Inclusion of the alphabet on the response
page assured that children’s performance was not hindered
by an inability to recall the form of individual letters. The
examiner said each word aloud two times and repeated
words upon child request. To encourage children to think
about the sounds of words rather than meaning, words
were not used in sentences. Children’s responses were not
restricted by time. To assure accuracy in interpretation of
child responses, the examiner copied the child’s response
in capital letters on the spelling response form after the list
was administered. If the examiner was unsure of what letters the child had written, she asked the child to “tell me
the letters you wrote here for [word].” At each time point,
approximately one-third of the participants completed each
of the three randomized lists. Lists were randomly assigned
to groups.
Analysis of Developmental Spelling Responses
The second author reviewed the copied words for all child
responses to identify any questionable copied letters. The
two authors discussed all disagreements to arrive at a mutual
agreement on the spellings. For each child response, the first
author determined which letter(s) of each response represented the consonant blend. The second author or one of the
other examiners reviewed the letter determinations of the
child responses. Any disagreements of letter determination
were discussed, and agreement was reached by the authors.
Reliability is reported in the following paragraphs.
Development of scoring guide . Before scoring any child
responses, a scoring guide was developed and informed by
Invernizzi et al. (2001) and Johnston, Invernizzi, and Juel
(1998). The goal in formulating the guide was (a) to identify all logical possibilities that children might generate to
represent the phonemes of the 26 blends that were evaluated
in the developmental spelling measure, and (b) to standardize procedures for scoring. Because we had not anticipated
fully the variety of child responses, some refinements to
the guide were made while scoring Time 1 responses. These
refinements were made as a result of discussion between
the two authors. No further changes to the guide were made
while scoring Time 2 and Time 3 responses.
The purpose of the study was to explore the segmentation and representation of consonant blends; therefore, the
objective was to credit spellings that represented logical
possibilities for the representation of the phonemes in each
blend. Although conventional spelling did not drive the scoring system, conventional spellings of the blends represented
one logical possibility for representation of the speech sounds.
In addition, children were given credit for substitutions of
letters that represent (a) sounds that differ only in voicing (e.g.,
b for /p/), (b) sounds produced as a result of co-articulation in
speech (e.g., ch for /t/, as in train), and (c) developmental
speech substitutions in children (e.g., w for /r/). Additionally,
the insertion of a vowel or “h,” presumably to capture the
aspiration feature or exaggerated pronunciation, between the
letters of a blend (e.g., “feree” or “fhree” for free) was accepted if the child attempted to represent the remainder of the
word. Thus, for any blend, a number of logical possibilities
were identified. For example, the blend at the onset of plum
could be logically represented (underlined letters) as plum,
pulum, phlum, pwum, puwum, phwum, blum, bulum, bhlum,
bwum, buwum, or bhwum, based on the phonetic properties
of place, manner, and voicing of the speech sounds in the
consonant blend.
Hierarchical linear modeling (HLM ). HLM was used
for analysis in this study because HLM provides many advantages over traditional repeated measures analysis (e.g.,
analysis of variance; Raudenbush & Bryk, 2002). For example, HLM allows for examination of both individual and
collective growth, as well as correlates of growth, whereas
traditional approaches only examine incremental or mean
growth. Because this study had three time points, linear
models were used. For a more detailed discussion of the
utility of HLM for individual growth curve analysis, see
Francis, Schatschneider, and Carlson (2000).
Reliability. Child responses were scored by the first author. For each round of data collection, a reliability examiner (second author or study examiner) checked the first
author’s scoring. Reliability was calculated based on the
number of words for which the reliability examiner agreed
with the first author’s scoring of the first sound of the blend
represented, second sound of the blend represented, and
blend represented. Reliability for each round, respectively,
was 97%, 99%, and 99%.
RESULTS
Descriptive statistics of study measures are provided in
Table 2. Children knew the majority of letter sounds and
were quite proficient in matching letters to the speech sounds
that were included in the developmental spelling measure
when they occurred at the beginning of CVC words. Because
children exhibited adequate letter-sound knowledge and
singleton segmentation ability to logically represent sounds
of words, performance on these tasks provides support for
use of a developmental spelling measure to tap representations of segmented phonemes in this group of children.
Werfel & Schuele: Segmentation and Representation of Consonant Blends
297
Table 2. Means and standard deviations of the study measures.
Time 1
M
Letter Sounds
Word Reading
Initial Sounds
Blend Representation
Time 2
SD
M
SD
19.73 3.89 21.65 3.08
12.23 15.46
__
10.10 1.58 10.55 0.82
10.13 5.67 13.70 7.80
Time 3
M
SD
22.67
21.20
10.93
14.92
2.72
2.84
0.27
7.77
Note. The word reading measure was only administered at Times 1
and 3. Maximum raw score for Letter Sounds = 26, Initial Sounds = 11,
Word Reading = 100, Blend Representation = 26.
Participants’ mean word reading score (max 100) was 12.23
at Time 1 (median = 7.00) and 21.20 at Time 3 (median =
12.50). Thus, the children in this study were emerging readers
but by no means were reading proficiently on a first-grade
level like the children in the Treiman (1991, 1993) studies.5
Correlations between measures are presented in Table 3.
As expected, performance on several study measures was
correlated. Children’s performance on letter sounds was
related to their performance on word reading and blend
representation. In addition, children’s performance on initial sounds was related to their performance on blend
representation.
Growth Model of Blends Variables
The first objective of this study was to describe the
growth of segmentation and representation of consonant
blends in the kindergarten year. Pursuant to this objective,
rate of growth and final status for each blend variable (i.e.,
blend representation, initial blends, final blends, initial
l-blends, initial r-blends, initial s-blends, final nasal blends,
final nonnasal blends, homorganic blends, nonhomorganic
blends, and initial nasal blends, as measured by the developmental spelling assessment; see Appendix B for blends
included in each variable) were modeled using HLM 6
(Raudenbush, Bryk, & Congdon, 2004). HLM 6 also was
used to evaluate the extent to which early literacy skills
measured at Time 1 (i.e., letter sound knowledge, initial
sounds, and word reading) served as both individual and
collective predictors of growth in blend representation.
Do kindergarten children exhibit growth in blend
segmentation and representation ability over time? The
linear model for each variable was fitted on the data for
all participants. Time was centered at the end (–2, –1, 0);
5
Compton et al. (2010) reported a mean of 29.81 on the word reading
measure for average-performing children in the fall of first grade. WIF
scores for first graders are highly correlated with Woodcock Johnson III
Word ID scores (.91; D. Compton, personal communication, May 6, 2011).
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thus, the intercept represents expected performance at the last
time of testing (Time 3). For example, the actual mean for
blend representation at Time 3 was 14.92 (see Table 2).
The estimated mean from the fitted growth model for blend
representation was 15.30 (see Table 4). The slope term
indicates the average amount of growth in blend representation expected over the assessment period (3 months).
Children represented an average of 2.24 more blends at
each time point (see Table 4). The kindergarten children
in this study exhibited incremental growth in representing
blends over the study period. There was no significant
variance in slope ( p = .13); thus, subsequent models
were run using a fixed slope.
Is blend segmentation and representation predicted
by early literacy skills? The conditional models for blend
representation are presented in Table 5 (individual predictors) and Table 6 (collective predictors). Static predictors,
children’s scores on early literacy measures at Time 1, were
used in this study. It was expected that children’s performance on measures of early literacy would predict later skill
in representing blends. Letter sounds, initial sounds, and
word reading were significant individual predictors of
blend representation (see Table 5). The collective model for
blend representation is presented in Table 6. In this model,
only letter sounds was a significant predictor of blend
representation.
Effects of Properties of Blends
The second objective of this study was to evaluate the
extent to which linguistic features influence the segmentation and representation of consonant blends. Specifically, we
were interested in the roles of word position (initial blends,
final blends), class of blends, homorganicity, and nasality.
Pursuant to this objective, comparisons are presented in
Table 7. Ordinary least squares statistics were obtained from
linear models run in HLM 6. Paired sample t tests were used
to compare performance on word position, class of blends,
homorganicity, and nasality (dependent variables calculated
as percentage correct). Because three classes of initial blends
(l-blends, r-blends, and s-blends) were examined, a oneway analysis of variance (ANOVA) was used to compare
performance on initial class of blends. The five research
questions pertaining to these properties are addressed in
the following paragraphs.
Are children more proficient with initial blend segmentation and representation than final blend segmentation
and representation? It was hypothesized that the position
of blends in words would influence children’s ability to
represent blends. Because segmenting initial sounds of CVC
words is easier than segmenting final sounds, we anticipated
that initial blends would be easier for children to represent
than final blends. Children represented initial blends (M =
61.32, SD = 33.76) with greater accuracy than they represented
final blends (M = 53.23, SD = 30.28; p = .02; d = 0.25). Effect
SCHOOLS • Vol. 43 • 292–307 • July 2012
Table 3. Correlation of study measures at each time.
1. LS1
2. LS2
3. LS3
4. WR1
5. WR3
6. IS1
7. IS2
8. IS3
9. BR1
10. BR2
11. BR3
1
2
3
4
5
6
7
8
9
10
11
—
.82**
—
.77**
.87**
—
.37*
.42**
.38*
—
.47**
.47**
.47**
.91**
—
.61**
.33*
.31*
.24
.27
—
.02
–.04
–.20
.06
.03
.04
—
.03
–.00
.14
.07
.09
–.04
–.16
—
.40**
.32*
.29
.28
.29
.40*
.32*
–.11
—
.51**
.42**
.43**
.36*
.30
.45**
.34*
.10
.66**
—
.28
.13
.10
.29
.25
.35*
.40*
–.28
.29
.49**
—
Note. LS = Letter Sounds, WR = Word Reading, IS = Initial Sounds, BR = Blend Representation. Numbers following
measure names indicate time (i.e., 1 indicates Time 1, 2 indicates Time 2, and 3 indicates Time 3).
*Correlation is significant at the 0.05 level (2-tailed). **Correlation is significant at the 0.01 level (2-tailed).
size indicates a small effect of position of blends in words
(Cohen, 1988). Follow-up t tests at each time indicated that
the children were more successful at segmenting and representing initial blends than final blends only at Time 2
(p = .00; d = 0.38).
Does the class of blends influence children’s proficiency
at segmenting and representing initial blends? It was hypothesized that children would be differentially successful
with initial blends based on class (Spencer et al., 2007). We
anticipated that children would be more successful representing l-blends and s-blends than r-blends. Contrary to
our hypothesis, children were not differentially successful
with initial blends based on class (p = .25). However, within
r-blends, blends in which phonemes’ coarticulation creates
affricates (i.e, /tr/ and /dr/; M = 25.00, SD = 32.03) were
more difficult for children to represent than other r-blends
(M = 38.00, SD = 35.32, p = .00, d = .39). In addition, when
limiting the analysis set to children who performed <30%
proficiency at Time 1 (n = 15), a simple examination of
the means suggested possible differences in blend representation based on initial class (Time 1 means: l-blends
23.33, s-blends 17.78, r-blends 7.62; Time 2 means:
Table 4. Unconditional model of blend representation growth.
Fixed effects
Coefficient
Intercept
Slope
15.30
2.24
SE
Random effects
t
1.27 12.08***
0.40 5.55***
*p < .05. **p < .01. ***p < .001.
Variance
c2
55.54
1.51
291.48***
49.24
l-blends 37.33, s-blends 25.33, r-blends 26.67; Time 3
means: l-blends 32.00, s-blends 33.33, r-blends 25.71).
Does the class of blends influence children’s proficiency
at segmenting and representing final blends? It was hypothesized that children would be differentially successful
with final blends based on class. Read (1975), Treiman
(1993), and Treiman et al. (1995) reported substantial differences across final blends; final nasal blends were the most
difficult for children to represent. Thus, we anticipated
that children would be more successful representing final
nonnasal blends than final nasal blends. Children were
more successful at representing final nonnasal blends (M =
67.08, SD = 32.38) than final nasal blends (M = 30.14; SD =
41.23; p = .00; d = 1.00). Effect size indicates a large effect
of final class of blends.
Are children more proficient at segmenting and
representing homorganic blends than nonhomorganic
blends? Contrary to the evidence reported for children
proficient at blend segmentation and representation (e.g.,
Treiman, 1993), it was hypothesized that homorganicity
would influence children’s success at representing consonant
blends early in development. Children might use articulatory
cues early in development and, thus, would be more successful at representing nonhomorganic blends (i.e., blends
whose phonemes had different places of articulation) than
homorganic blends. Children were more successful at representing nonhomorganic blends (M = 62.78, SD = 32.67)
than homorganic blends (M = 47.20, SD = 34.75; p = .00;
d = 0.46). Effect size indicates a medium effect of homorganicity
for kindergarten children. As previously discussed, children
have particular difficulty segmenting and representing final
nasal blends, and all final nasal blends are homorganic.
Follow-up t tests indicated that when only initial blends
were analyzed (n = 18), there were no differences between
homorganic and nonhomorganic blends ( p = .66, .27, .41
Werfel & Schuele: Segmentation and Representation of Consonant Blends
299
Table 5. Conditional models of blend representation growth using individual predictors.
Fixed effects
Individual predictors
Letter Sounds
Intercept
Word Reading
Intercept
Initial Sounds
Intercept
Random effects
Coefficient
SE
t
Variance
c2
0.92
0.18
5.09***
27.41
293.69***
0.16
0.06
2.74**
34.32
358.13***
2.06
0.62
3.31**
29.59
313.99***
Note. Predictor variables are values from Time 1.
*p < .05. **p < .01. ***p < .001.
at each time, respectively). In addition, when final blends
were analyzed without final nasal blends (n = 5), there were
no differences between homorganic and nonhomorganic
blends ( p = .45, .68, .56 at each time, respectively).
Are children more proficient at segmenting and representing initial blends that include nasal consonants than
final blends that include nasal consonants? Following up
on Treiman (1993) and Treiman et al.’s (1995) speculation
that children’s difficulty with final nasal blends can be
attributed to vowel nasalization, we compared children’s
performance on initial nasal blends (e.g., small ) to their
performance on final nasal blends (e.g., jump). Vowels are
nasalized when they are followed by nasal consonants but
not when nasal consonants precede vowels. It was hypothesized that the position of nasal blends in words would
influence success such that children would be more successful at representing initial nasal blends than final nasal
blends. We wanted to document that children’s difficulty
with nasal blends is exclusive to final nasal blends and is not
a property of nasal blends in general. Children were more
successful at representing initial nasal blends (M = 62.92,
SD = 39.81) than final nasal blends (M = 30.14, SD = 41.23;
p = .00; d = 0.81). Effect size indicates a large effect of
the position of nasal blends in words.
Analyses to Evaluate Scoring System
Because our scoring system was more liberal than those
previously reported in the literature, we performed several
analyses to confirm that our results were not affected by certain scoring decisions we made. Specifically, we performed
these analyses to ensure that letter-sound knowledge, MGRs,
or allowing the insertion of vowels between the two blend
phonemes did not affect outcomes.
Recall that our scoring system credited “logical” representations of phonemes but did not allow for the possibility that children might analyze the blend as containing two
sounds but then misrepresent one or both sounds due to low
letter-sound knowledge. Table 8 presents the percentage of
children’s spellings of blends based on letter-sound knowledge. Child responses were coded based on children’s use
of letters to represent sounds. Overall, 50% of the spellings
used two logical consonants (e.g., “plum” or “pwum” for
/pl /). Forty-one percent of the spellings had one logical consonant and one omitted consonant (e.g., “p” for /pl/), likely
indicating a lack of segmentation. Approximately 5% of the
spellings included one logical consonant and one illogical
consonant (e.g., “fl” for /pl /). Spellings with one illogical
consonant and one omitted consonant (e.g., “f ” for /pl/) and
Table 6. Conditional models of blend representation growth using collective predictors.
Fixed effects
Intercept
Letter Sounds
Word Reading
Initial Sounds
Random effects
Coefficient
SE
t
0.50
0.07
1.10
0.25
0.07
0.61
1.96*
1.11
1.82
Variance
c2
26.16
259.71***
Note. Predictor variables are values from Time 1.
*p < .05. **p < .01. ***p < .001.
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Table 7. Percentage correct (M, SD) based on the properties of
the blends.
Position
Initial blends
Final blends
Class-Initial
l-blends
r-blends
s-blends
Class-Final
Nonnasal
Nasal
Homorganicity
Nonhomorganic
Homorganic
Nasality-Position
Initial Nasal
Final Nasal
Mean
SD
t or F
61.32
53.23
33.76
30.28
2.385*
0.25
69.42
55.77
60.67
31.22
29.87
32.12
1.389
–
67.08
30.14
32.38
41.23
5.834***
1.00
62.78
47.20
32.67
34.75
4.634***
0.46
62.92
30.14
39.81
41.23
4.828***
0.81
Finally, it is possible that children were able to represent
both phonemes of a consonant blend not because of analysis
of sound, but rather as a result of possessing a clear MGR
of the target word. Table 9 presents the percentage of children’s spellings of words that indicated that the child had
a complete MGR (i.e., a conventional spelling) of the target word. Child responses were coded based on children’s
spelling of the entire word. If the entire word was spelled
conventionally, we coded the spelling as a complete MGR.
Overall, only 13% of the children’s spellings were words
that were spelled conventionally, and only 4% of the children’s spellings were conventional spellings of words that
required an MGR to spell correctly (i.e., words that did
not have one-to-one letter-sound mappings). These results
suggest that the children in our study rarely relied on a
complete MGR to spell words.
d
DISCUSSION
Note. F reported for Class-Initial; t reported for all others.
Unlike previous studies examining the segmentation and
representation of consonant blends in first-grade children
(e.g., Treiman, 1991, 1993), the results of the present study
suggest that kindergarten children show an emerging ability to segment and represent consonant blends. The kindergarten children in this study on average represented È50%
of consonant blends with two logical letters at Time 1.
Importantly, the ability to segment and represent consonant
blends varies during this early period of emergence depending
on the linguistic and phonetic features of the blends (e.g.,
word position, blend class, homorganicity), consistent with
Read (1975, 1986). These findings are somewhat inconsistent
with those of Treiman’s (1991, 1993) studies of first-grade
children.
*p < .05. **p < .01. ***p < .001.
spellings with two omitted consonants (e.g., no letters to
represent the blend; “um” for plum) accounted for 1.5% of the
spellings each. Less than one percent of spellings included
two illogical consonants (e.g., “fs” for /pl/). Blend representations with illogical consonants accounted for less than
7% of the spellings; thus, we are confident that our scoring
adequately captured children’s analysis of phonemes.
Additionally, our scoring system allowed for the insertion of a vowel (or an “h” but this never occurred) between
the two phonemes of a blend, which is different from previously reported developmental spelling scoring schemes.
We allowed for these responses that presumably captured
aspiration or exaggerated pronunciation of phonemes. Analyses revealed that <3% of blend representations (n = 37)
contained a vowel between the two phonemes of the blends.
The majority of such responses occurred with r-blends (n = 12)
and l-blends (n = 17). Only five such instances occurred with
final blends. Such a small percent of overall representations
does not appear to have affected the study outcomes.
Developmental Change
Unlike Treiman’s (e.g., 1991, 1993) studies, which captured late development to proficiency, this study captured
earlier developmental change in segmentation and representation of blends. When all data are collapsed, È70% of
consonant blends in Treiman’s (1991, 1993) studies were
Table 8. Percentage of blend representations based on letter-sound knowledge.
Both sounds logically represented
No sounds represented
One sound illogical + one sound omitted
One sound logical + one sound omitted
One sound logical + one sound illogical
Both sounds illogically represented
Time 1
Time 2
Time 3
Overall
40.29
2.02
1.92
48.08
7.02
0.67
52.50
1.63
1.25
39.52
4.13
0.96
57.50
1.06
1.54
36.15
2.98
0.38
50.10
1.57
1.57
41.25
4.71
0.67
Werfel & Schuele: Segmentation and Representation of Consonant Blends
301
Table 9. Percentage of spellings indicating a complete mental
grapheme representation (MGR).
Time 1
Time 2
Time 3
Overall
8.08
12.69
18.56
13.11
91.92
87.31
81.44
86.89
Conventional spelling
(i.e., MGR)
Unconventional spelling
represented with two legal graphemes (i.e., the sound can be
represented by that letter in English), whereas only 50% of
blends in the present study were represented with two logical
graphemes, using a much more liberal scoring procedure.
At Time 1, 21% of the children scored <25% on blend representation and 47% scored <50%. In addition, Treiman’s
studies provide a cross-sectional picture of proficiency,
whereas this study captured developmental change by following the same group of children across the latter half
of kindergarten. To our knowledge, this study provides the
only analysis of the growth of children’s blend segmentation over time. Thus, the present study provides a different
perspective with regard to the development of children’s
ability to segment consonant blends. When examined earlier
in development, there appear to be differences in segmentation and representation across blend types.
Predictors of blend representation. Individually, letter
sounds, initial sounds, and word reading were all significant predictors of blend segmentation and representation.
However, in the collective model, only letter sounds remained as a significant predictor. Thus, children’s knowledge of letter sounds is the most robust predictor of their
ability to segment and represent blends. We hypothesized
that initial sounds and word reading would also predict
blend segmentation and representation, but when evaluated
with letter sounds, neither remained a significant predictor. Recall that initial sounds was an experimental task of
phonemic segmentation that we designed for this study. It
may be that the lack of significance was due to the lack of
variance on this task rather than the skill of segmentation.
In addition, we expected word reading to predict blend
segmentation and representation. However, the relation
may in fact be that blend segmentation and representation
predicts word reading. Finally, we did not include an oral
segmentation task to use as a predictor. Future studies can
evaluate these possibilities.
Word position. Several researchers have reported that
children are first able to segment consonants at the beginning
of words and thereafter consonants at the end of words (e.g.,
Stahl & Murray, 1994). The results of this study suggest
that this distinction may not be as important in the case of
consonant blend segmentation and representation. Although
the difference in segmenting and representing initial and
final blends was statistically significant in favor of initial
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blends, the effect size was small (d = .25), and significance
remained only at Time 2 when this difference was examined
at each time. In addition, raw scores indicated that children
were more proficient at segmenting and representing both
sounds of final s-blends than any other type of blend, including initial s-blends. Future research can provide a more
detailed exploration (e.g., multiple exemplars per blend) of
the effect of word position on children’s ability to segment
and represent blends.
Blend class. Class of blends appears to be an important
factor in children’s proficiency at segmenting and representing final blends but not initial blends. Children were
much more likely to segment and represent final s-blends
than final nasal blends. The effect size (d = 1.0) indicated
a very large effect of class on final blend segmentation
and representation. In contrast to final blend class, the difference among initial classes of blends was not significant.
However, an analysis of the lowest performing children
suggested possible differences in blend segmentation and
representation based on initial class early in development.
Perhaps different properties of the phonemes that comprise
blends may influence children’s ability to segment and represent blends at different points throughout development
of the skill. Class of initial blends may be most important
very early in the development of blend segmentation and
representation. Future research should explore in more depth
blend segmentation and representation among the least
proficient emergent readers and writers who may have
unique learning needs.
Homorganicity. In the current study, homorganicity
proved to be important in children’s segmentation and
representation of blends when all blends were considered
together. Children were more successful with blends that
included two phonemes with different places of articulation than blends that included two phonemes with the same
place of articulation (d = .46). Thus, salient kinesthetic cues
available when adjacent consonants have different places
of articulation may play a role in the ease of segmentation
and representation of consonant blends at least at some
points in development. These results contradict van Bon
and Uit De Haag (1997), who concluded that children were
more proficient at segmenting and representing homorganic
blends than nonhomorganic blends, as well as Treiman
(1993), who concluded that homorganicity did not influence
children’s blend segmentation and representation. Van Bon
and Uit De Haag’s study targeted CCVCC words. The added
difficulty of longer words that contained two consonant blends
might have had more influence on the children’s ability to
segment and represent blends than homorganicity (Stahl &
Murray, 1994). In addition, van Bon and Uit De Haag assessed pseudowords, whereas Treiman (1993) and the present
study assessed real words. Treiman’s study included children who were quite proficient at blend segmentation and
representation, whereas blend segmentation and representation of the children reported here was captured earlier in
SCHOOLS • Vol. 43 • 292–307 • July 2012
development. Perhaps homorganicity exerts an influence on
children’s ability to segment and represent consonant blends
early in emergence of the skill. However, recall that final
nasal blends were particularly difficult for all children to
segment and represent. Because all final nasal blends are
homorganic, we followed up our initial analysis with an examination of homorganicity of only initial blends and final
blends without final nasal blends. When only initial blends
or final blends without final nasal blends were considered,
homorganicity did not appear to be an important factor. Thus,
it appears that although homorganicity may play a role in children’s segmentation and representation of blends at some
points in development, differences in performance based on
homorganicity may be driven by nasality rather than place of articulation. Future research should study this issue in more detail.
Final nasal blends. As previously discussed, children
were much more likely to segment and represent final s-blends
than final nasal blends (d = 1.0). In addition, children were
more likely to segment and represent initial nasal blends than
final nasal blends (d = .81). These large effects add to existing
evidence (e.g., Read, 1975; Treiman, 1993; Treiman et al.,
1995; van Bon & Uit De Haag, 1997) that final nasal blends
present a particular challenge to children in the course of
development of the segmentation and representation of consonant blends. In fact, it appears that a certain level of proficiency at segmenting and representing other types of blends
may be necessary before the ability to segment and represent final nasal blends advances beyond a minimal level of
proficiency.
Several factors may play a role in children’s particular
difficulty with segmenting and representing final nasal blends.
First, Ohde, Haley, and Barnes (2006) reported that perceptual cues to place of articulation for nasal consonants were
diminished in VC (e.g., /an /) contexts as compared to CV
(e.g., /na /) contexts. They also found that child productions
of nasal syllables contained less prominent perceptual cues
than aduIt productions. Thus, it appears that perceptual cues
for postconsonantal nasals are not as strong as for preconsonantal nasals. In addition, children’s self-rehearsals of
words with final blends likely contain less prominent perceptual cues, which may lead to incomplete segmentation and
representation of final nasal blends. Second, Treiman et al.
(1995) suggested that children’s phonemic representations
may differ from the conventional writing system. Thus, children may attribute the nasal quality to the preceding vowel
until experience with written language teaches them conventional spelling of final nasal blends. There is minimal
nasality on vowels when preceded by nasal consonants, so
omission of the nasal consonant is much less frequent in
initial nasal blends.
Implications for Educational Practice
The order of development of segmentation and representation of consonant blends has implications for educational
programs for young children with respect to phonemic
awareness and spelling. Explicit phonemic awareness instruction
has proven effective for children who struggle to learn early
literacy skills (e.g., Ball & Blachman, 1988). However,
Al Otaiba and Fuchs (2002) reported that a majority of
children who are unresponsive to early literacy instruction
continue to have substantial deficits in phonemic awareness.
In addition, deficits in orthographic knowledge are associated
with treatment nonresponsiveness (Al Otaiba & Fuchs, 2002).
Thus, it appears that the current broad phonemic awareness
and orthographic knowledge interventions are not sufficiently
effective for the lowest performing students. There is a need for
a more incremental study of early literacy skills, including
phonemic awareness and orthographic knowledge, so that
educators can be more successful at teaching such skills to
children who struggle with early literacy despite best efforts
to teach them.
It is important to consider factors that affect development of the ability to segment and represent consonant blends
when choosing words for teaching segmentation and representation. For example, jump is not an appropriate word for
a student with little segmentation and representation skill
because final nasal blends are particularly difficult. Instead,
the results of this study suggest that beginning instruction
with final s-blends would be more developmentally appropriate. In fact, we propose the following order of
instruction:
1. Final s-blends
2. Initial l-blends
3. Nonhomorganic initial s-blends
4. Initial r-blends and homorganic initial s-blends
5. Final nasal blends
This study identifies an area in early reading and spelling
instruction in which SLPs can collaborate with classroom
teachers. Many teachers may lack specific knowledge of
speech sounds and mapping speech to print that should
influence word choice in early reading and spelling tasks
(Moats, 1994). For example, SLPs’ knowledge exceeded
teachers’ knowledge on a paper and pencil task of explicit
phonemic awareness, and teachers were less able than SLPs
to ignore their orthographic knowledge in analyzing the
sounds of words (Spencer, Schuele, Guillot, & Lee, 2008).
Additionally, SLPs can assist teachers in understanding how
the range of kindergartners’ spellings provides valuable
insight into children’s phonemic awareness and orthographic
knowledge.
Limitations and Future Directions
The use of a developmental spelling measure rather than
oral segmentation is a limitation of the study. The efficiency
of a developmental spelling as a measure of phonemic
awareness over oral segmentation allowed for inclusion of
a greater number of participants; however, it is possible
Werfel & Schuele: Segmentation and Representation of Consonant Blends
303
that the conclusions we have drawn about phonemic awareness development would have differed had we used an oral
segmentation task. It is possible that children could have orally
segmented blends but be unable to represent them in writing.
In this first step study, we did not address this possibility
directly. We attempted to control for the possibility by
examining responses for misrepresentations of phonemes,
but future research should directly compare performance on
developmental spelling and oral segmentation.
In addition, the evaluation of each blend at each time
was based on only one exemplar of each blend. It is possible that for some words, children had a stored MGR of the
written form. We attempted to control for this possibility
by examining children’s full word spellings (and found that
very few responses were conventionally spelled), but it is
possible that children had partial MGRs for some words.
We were not able to address this possibility. Future studies
could evaluate children’s representations of nonwords with
blends. Another possible limitation is that we administered
the items on the developmental spelling task in the absence
of sentence contexts. We did this to limit the sources of
other types of linguistic information (e.g., semantics, syntax,
coarticulation) to the greatest extent possible so as to better ensure that children’s spellings were based mainly on
phonology. However, it is possible that children misperceived
the target words without the semantic context that a sentence would provide. A future evaluation comparing the two
modes of administration would better inform spelling testing
procedures.
Another possible limitation is our use of a nonstandardized word reading measure. We chose the WIF curriculumbased reading measure because it allowed us to administer
a different word list at each time and avoided the floor effects and reduced variability of many norm-referenced word
recognition measures. However, the word reading measure
did not allow us to assign a grade level or percentile to children’s reading performance. Such a measure might have
aided readers in generalizing our findings.
Finally, one of our words contained a morphological
blend (rocks). We selected this word due to a limited field
of exemplars ( fox, box). Thus, it was possible that children’s
representation of the final /ks / blend in “rocks” could be
affected by morphological knowledge. However, follow-up
analysis indicated that there was no difference across words
at any time for final /ks / representation.
The results of this study suggest that, at least in children
with typical development, success with segmentation and
representation of consonant blends depends somewhat on
properties of the phonemes that comprise the blends. A clear
developmental sequence emerged. Future research should
investigate the effectiveness of intervention that follows this
developmental sequence as compared to general blend segmentation instruction. In addition, future research should
explore the differential success of children with language impairments and children who are struggling readers, including
304
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AND
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those with language impairments, with segmentation
and representation of consonant blends and effectiveness
of blend segmentation and representation training for children who have difficulty acquiring the skill of segmenting
and representing blends.
ACKNOWLEDGMENTS
Funding for this study was provided by an American SpeechLanguage-Hearing Association Students Preparing for Academic
and Research Careers (SPARC) Award to the first author and a
United States Department of Education Personnel Leadership
Grant (H325D080075; PI: Schuele), which supported the research
training of the first author. The content is solely the responsibility
of the authors and does not necessarily represent the official views
of the American Speech-Language-Hearing Association or the U S
Department of Education. The authors thank the parents, students,
and faculty of the schools that participated, including St. Henry
School.
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Werfel & Schuele: Segmentation and Representation of Consonant Blends
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APPENDIX A. DEVELOPMENTAL SPELLING WORD LISTS
306
List 1
List 2
List 3
Initial blends
/sp/
/st /
/sk /
/sl /
/sm /
/sn /
/pl /
/pr /
/bl /
/br/
/tr/
/dr/
/ kl /
/ kr/
/gl /
/gr /
/fl /
/fr /
spot
step
skip
sleep
smell
snake
play
price
blow
broom
truck
drum
clap
crop
glass
green
flag
fruit
spin
stick
skin
slide
smoke
snail
plum
prize
block
brown
train
drive
cloud
crown
globe
grape
floor
frog
spoon
stove
skate
slip
small
snack
plane
press
blue
bread
treat
dress
clock
crib
glove
grass
flame
free
Final blends
/ft /
/sk /
/sp/
/st /
/ ks /
/ nt /
/ nd /
/ mp /
soft
mask
wasp
fast
box
ant
hand
camp
gift
ask
lisp
last
fox
want
sand
jump
lift
desk
gasp
list
rocks
hunt
find
lamp
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APPENDIX B. BLENDS IN EACH VARIABLE
Initial blends
/sp/ /st / /sk /
Final blends
/ft / /sk / /sp/
/sl /
/sm /
/st /
/nt /
/sn /
/pl /
/pr/
/mp/
/nd /
/ ks /
/ bl /
/ br /
/tr /
/dr /
/ kl /
/dr/
/ kl/
/ kr/
/gl /
/gr/
/ kr /
/gl /
/gr/
/fl /
/fr/
Initial l-blends
/sl / /pl / /fl / / bl / / kl / /gl /
Initial r-blends
/pr / / br / /tr / /dr / / kr/ /gr / /fr /
Initial s-blends
/sp/ /st / /sk / /sl / /sm / /sn /
Final s-blends
/sk / /sp/ /st / / ks/
Final nasal blends
/nt / /mp/ /nd /
Homorganic blends
/st / /sl / /sn / /mp/ /nd /
Nonhomorganic blends
/sp/ /sk / /sm / /pl / /pr/
/nt /
/ bl /
/ br/
/tr/
/fl /
/fr/
/ft /
/ ks /
Initial nasal blends
/sm / /sn /
Final nasal blends
/nt / /mp / /nd /
Werfel & Schuele: Segmentation and Representation of Consonant Blends
307